diff --git a/usr.bin/fsync/fsync.c b/usr.bin/fsync/fsync.c
--- a/usr.bin/fsync/fsync.c
+++ b/usr.bin/fsync/fsync.c
@@ -49,7 +49,7 @@
 	
 	rval = EX_OK;
 	for (i = 1; i < argc; ++i) {
-		if ((fd = open(argv[i], O_RDONLY)) == -1) {
+		if ((fd = open(argv[i], O_RDONLY | O_NONBLOCK)) == -1) {
 			warn("open %s", argv[i]);
 			if (rval == EX_OK)
 				rval = EX_NOINPUT;